Heavy Duty Display Support System

Abstract

A support system for a display device includes a first arm configured to extend from a support surface. A second arm is rotatably coupled to the first arm. The second arm has a range of motion relative to the first arm. A tilt head is rotatably coupled to the second arm, the tilt head configured to couple to a display. A first biasing member is positioned within the second arm, the first biasing member configured to provide a first counterbalancing force to the second arm to counterbalance a load of the display. A second biasing member is positioned within the second arm, the second biasing member configured to provide a second counterbalancing force to the second arm to counterbalance a load of the display. A lockout mechanism is configured to disengage the second biasing member to eliminate the second counterbalancing force over at least a portion of the range of motion.

Description

[Technical field]

[0001] Various exemplary embodiments relate to a support system used to movably support an electronic display, such as a monitor or TV.

[0002] [Citation to Related Applications] This application is a priority application based on U.S. Provisional Patent Application No. 63 / 187,700, filed May 12, 2021, the disclosure of which is incorporated by reference in its entirety. [Background technology]

[0003] Modern screen-type display devices are typically flat screen displays mounted on a lifting support. One particular support utilizes a movable support arm that may then be secured to a surface so that the display is held above or in front of the surface. A typical display support has a weight limit in the range of 0 kg to 9 kg, sufficient for standard displays, e.g., monitors up to 27 inches. An example of such a support system is shown in U.S. Pat. No. 9,316,346, the disclosure of which is incorporated herein by reference in its entirety. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] U.S. Pat. No. 9,316,346 Summary of the Invention [Problem to be solved by the invention]

[0005] When a large display outside the standard weight range is used with a standard arm, the weight of the display may be greater than the counterbalancing force provided by the arm. As a result, the arm may not be able to support the display in the position desired by the user. Therefore, large displays are typically supported by stationary mounts, which limits the positioning and versatility offered by a movable support. [Means for solving the problem]

[0006] In one particular embodiment, a support system for a display device includes a first arm configured to extend from a support surface. A second arm is rotatably coupled to the first arm. The second arm has a range of motion relative to the first arm. A tilt head is rotatably coupled to the second arm, the tilt head configured to couple to a display. A first biasing member is positioned within the second arm, the first biasing member configured to provide a first counterbalancing force to the second arm to counterbalance a load of the display. A second biasing member is positioned within the second arm, the second biasing member configured to provide a second counterbalancing force to the second arm to counterbalance a load of the display. A lockout mechanism is configured to disengage the second biasing member to eliminate the second counterbalancing force over at least a portion of the range of motion.

[0007] In one particular form, the lockout mechanism moves a portion of the second biasing member relative to the first biasing member to prevent the second counterbalancing force from acting with the first counterbalancing force.

[0008] In one particular form, a first biasing member is coupled to the first bracket and a second biasing member is coupled to the second bracket, and the lockout mechanism is configured to move the second bracket relative to the first bracket to disengage the second biasing member.

[0009] In one particular form, the second arm is rotatably connected to the first arm about the first axis, and the link has a first end positioned on the first bracket and a second end positioned below the second axis.

[0010] In one particular form, a first biasing member is positioned within the first casing and a second biasing member is positioned within the second casing, and the lockout mechanism is configured to move the second casing relative to the first casing to disengage the second biasing member.

[0011] In one particular form, the second casing is slidably coupled to the second arm.

[0012] In one particular form, the lockout mechanism includes a rotatable member.

[0013] In one particular embodiment, an adjustment mechanism is configured to vary the magnitude of the first counterbalancing force provided by the first biasing member.

[0014] In one particular embodiment, a support system for a display device includes a first arm configured to extend from a support surface. A second arm is rotatably coupled to the first arm. The second arm has a range of motion relative to the first arm. A tilt head is rotatably coupled to the second arm, the tilt head configured to couple to a display. A first spring casing is positioned within the second arm. A first spring is positioned within the first spring casing. A second spring casing is positioned within the second arm. The second spring is positioned within the second spring casing. The second spring casing is movable from a first position in engagement with the first spring casing to a second position in disengagement with the first spring casing.

[0015] In one particular form, a lockout mechanism is coupled to the second spring casing to move the second spring casing between the first and second positions.

[0016] In one particular form, the lockout mechanism includes a rotatable member that is user accessible to adjust the position of the second spring casing.

[0017] In one particular form, a first spring casing is coupled to a first bracket and a second spring casing is coupled to a second bracket, the second bracket being engaged with the first bracket in the first position and the second bracket being disengaged from the second bracket in the second position.

[0018] In one particular form, the first spring casing has a first groove and the second arm has a first rail that mates with the first groove.

[0019] In one particular form, the first spring casing has a projection with a front wall and the second spring casing has a rear wall that mates with the front wall.

[0020] In one particular embodiment, an adjustment mechanism is configured to vary the magnitude of the first counterbalancing force provided by the first biasing member.

[0021] In one particular embodiment, a support system for a display device includes a first arm configured to extend from a support surface. A second arm is rotatably coupled to the first arm. The second arm has a range of motion relative to the first arm. A tilt head is rotatably coupled to the second arm, the tilt head configured to couple to a display. A first casing is positioned within the second arm. A first bracket is coupled to the first casing. A first biasing member is positioned within the first casing, the first biasing member configured to provide a first counterbalancing force to the second arm to counterbalance a load of the display. A second casing is positioned within the second arm. A second bracket is coupled to the second casing. A second biasing member is positioned within the second casing, the second biasing member configured to provide a second counterbalancing force to the second arm to counterbalance a load of the display. A lockout mechanism is configured to disengage the second biasing member to eliminate the second counterbalancing force over at least a portion of the range of motion.

[0022] In one particular form, the lockout mechanism is configured to move the second casing and the second bracket within the second arm relative to the first casing and the first bracket.

[0023] In one particular form, the lockout mechanism includes a rotatable member that is accessible to the user through an opening in the second arm.

[0024] In one particular form, a fastener passes through the second casing and the second bracket, and the lockout mechanism is threadably coupled to the fastener.

[0025] In one particular form, the second arm is rotatably connected to the first arm about the first axis, and the link has a first end positioned on the first bracket and a second end positioned below the second axis.

[0026] Various aspects and features of the exemplary embodiments will become apparent from the following detailed description of the exemplary embodiments, which proceeds with reference to the accompanying drawings. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is an isometric view of a support system for a display. [Diagram 2] FIG. 13 is a partial exploded view of a second arm of the support system. [Diagram 3] FIG. 13 is a side view of the second arm without the housing member. [Figure 4] FIG. 13 is a rear isometric view of components of the second arm biasing system. [Diagram 5] FIG. 5 is a partial exploded view of the components of FIG. 4. [Figure 6] FIG. 4 is a front cross-sectional view of the second arm. [Figure 7] FIG. 13 is a side cross-sectional view of the second arm with the second spring engaged; [Figure 8] FIG. 13 is a side cross-sectional view of the second arm with the second spring disengaged. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Certain exemplary embodiments of the display support system relate to a movable arm support configured to support a heavier display than can typically be supported by a conventional movable support arm. Additionally, certain embodiments provide one or more force adjustment mechanisms that allow a user to vary the counterbalancing force of the arm as needed.

[0029] FIG. 1 illustrates an exemplary embodiment of a support system 100 for a display, the support system including a mounting portion 102. The mounting portion 102 is configured to secure the support system 100 to a support surface (not shown). The mounting portion 102 may include a clamp member 104 that may be coupled to a variety of surfaces or supports, such as a desk, table, wall, etc., as will be appreciated by those skilled in the art. A first arm 106 extends from the mounting portion 102. In one particular embodiment, the first arm 106 is rotatably coupled to the mounting portion. An intermediate joint 108 is rotatably coupled to a distal portion of the first arm 106. A second arm 110 is rotatably coupled to the intermediate joint 108. A head joint 112 is rotatably coupled to a distal portion of the second arm 110. A tilt mechanism 114 is movably coupled to the head joint 112. A display mount (not shown), e.g., a VESA-type display mount, may be coupled to the tilt mechanism 114 to receive the display, or the display may be directly coupled to the tilt mechanism. The first arm 106, the intermediate joint 108, the second arm 110, the head joint 112, and the tilt mechanism 114 may each include a single or multi-piece housing component, e.g., the first and second parts are coupled to each other. Other housing parts may be coupled as needed. One or more cable management or management devices 116 may be provided on one or more of the arms to organize and hold the cables extending to the display. The first arm 106, the intermediate joint 108, the second arm 110, the head joint 112, and the tilt mechanism 114 constitute exemplary embodiments of a support structure, although other forms of support structures may also be used.

[0030] As best shown in FIG. 1, the first arm 106 can rotate about a first vertical axis A1 relative to a support or surface. The intermediate joint 108 can rotate about a second axis A2 relative to the first arm 106. The second arm 110 can rotate about a third axis A3 relative to the intermediate joint 108. The head joint 112 can rotate about a fourth axis A4 relative to the second arm 110. The tilt mechanism 114 can rotate about a fifth axis A5 and a sixth axis A6 relative to the head joint 112. In the illustrated embodiment, the first axis A1 and the second axis A2 are vertical axes. The third axis A3 and the fourth axis A4 are horizontal axes. The fifth axis A5 is a vertical axis and the sixth axis A6 is a horizontal axis. In the illustrated embodiment, the sixth axis A6 is an imaginary axis spaced from the tilt mechanism 114 so as to pass through either the display mount or a portion of the display coupled to the display mount.

[0031] 2 and 3 show an example set of components of the second arm 110, which may include a housing 120. The housing 120 holds a first spring casing 122 and a second spring casing 124. A first spring 126 is positioned within the first spring casing 122 and a second spring 128 is positioned within the second spring casing 124. A first spring bracket 130 is coupled to the first spring casing 122 and a second spring bracket 132 is coupled to the second spring casing 124. A pair of spring links 134 are coupled to the first spring bracket 130 and the intermediate joint 108. In one particular form, the spring link 134 may be connected to the intermediate joint 108 about the third axis A3 below the rotatable connection of the second arm 120 and the intermediate joint 108. A first spring adjustment mechanism 136 is positioned within the housing 120, the first spring adjustment mechanism extending into the first spring casing 122. A lockout mechanism 138 is positioned within the housing 120, the lockout mechanism engaging the second spring casing 124.

[0032] In one particular form, a direct link 140 has a first portion pivotally connected to the intermediate joint 108 and a second portion pivotally connected to the head joint 112. The direct link 140 may extend through the housing 120 and pass through the second spring casing 124 and the second spring 128. During movement of the second arm 110 from the raised position to the lowered position, the direct link 140 causes rotation of the head joint 112 about the horizontal axis A4 such that the mounted display maintains its position relative to the support surface during rotation of the second arm 110.

[0033] In the illustrated embodiment, the first spring 126 and the second spring 128 are coil springs that exert a biasing force in response to spring compression. This force is exerted on first and second spring brackets 130, 132 and transmitted to the intermediate joint 108 via a spring link 134. This force is used to counteract the downward force on the second arm 110 exerted by the load of a display coupled to the second arm 110.

[0034] The illustrated embodiment shows the first and second springs 126, 128 as upper and lower springs relative to the housing 120. Other embodiments can have different locations and different configurations for the first and second springs 126, 128 to initially provide a counterbalancing force to the arm 110. Other embodiments can also utilize different biasing members as desired.

[0035] The first spring adjustment mechanism 136 may include a shaft 142 coupled to an adjustable plate 144. The first spring 126 abuts the adjustable plate 144 at a distal end relative to the intermediate joint 108. The adjustable plate 144 may be threadedly engaged with the shaft 142 and keyed to the housing 120 such that rotation of the shaft 142 results in translational movement of the adjustable plate 144 within the housing 120. The shaft 142 may be rotatable by a user to move the adjustable plate 144 as desired or required depending on the weight of the display. The shaft 142 may have a rear portion accessible to a user through an opening in the housing 120. The shaft 142 may have a user interface (e.g., thumb wheel, hex socket, etc.) to allow engagement and rotation by the user. A window 146 may be provided in the housing 120 to allow a user to view the position of the adjustment plate 144. One or more indicators may be provided on the window 146 or adjacent the housing 120 to enable the user to more easily determine the amount and position of adjustment of the plate 144 .

[0036] The lockout mechanism 138 is configured to disengage the second spring 128 to reduce or eliminate the counterbalancing force provided by the second spring 128. In one particular form, the lockout mechanism 138 is capable of disengaging the second spring 128 such that no biasing force is transferred from the second spring 128 to counterbalance the installed load over at least a portion of the travel distance of the second arm 110.

[0037] Although the illustrated embodiment shows a first spring adjustment mechanism 136 associated with the upper spring and a lockout mechanism 138 associated with the lower spring, these components may be reversed or moved to other positions for different spring configurations.

[0038] 4 and 5 show exemplary embodiments of the first and second spring casings 122, 124, the first and second spring brackets 130, 132, and the spring lockout mechanism 138. In one particular form, the second spring casing 124 and the second spring bracket 132 engage the first spring casing 122 and the first spring bracket 130 to provide the sum of the biasing forces of both the first spring 126 and the second spring 128 to the spring link 134. The second spring casing 124 is movable relative to the first spring casing 122 by the lockout mechanism 138 such that the second spring casing 124 and the second spring bracket 132 disengage from the first spring casing 122 and the first spring bracket 130 over at least a portion of the rotational movement of the second arm 110 relative to the intermediate joint 108.

[0039] In one particular form, the first spring casing 122 has a substantially open first end 150 through which the first spring 126 passes. The first spring 126 may be seated in a substantially closed second end 152 of the spring casing. An upper portion of the first spring casing 122 has a curved configuration, although different shapes and dimensions may be used depending on the exterior or interior surface configuration of the housing 120.

[0040] The lower portion of the first spring casing 122 has one or more grooves 154 extending in the outer surface of the first spring casing 122 and along at least a portion of the first spring casing. The grooves 154 may be provided on each side of the first spring casing 122. As best shown in FIG. 6, the grooves 154 receive a first rail 156 formed on the housing 120. Although only a single side is shown, the second side can have an identical configuration. The slidable engagement of the rails 156 and the grooves 154 allows the first spring casing 122 to translate relative to the housing 120. This translation helps ensure smooth movement of the second arm 110 while minimizing or eliminating any bending or twisting forces caused by the first spring 126 during movement of the second arm 110 or a component of the housing.

[0041] The lower portion of the first spring casing 122 further includes a base with a protrusion 158 that extends below the groove 154 and toward the rear of the first spring casing 122. The protrusion 158 may have a front wall 160. An opening is formed in the protrusion 158 to receive a fastener 162 to connect the first spring bracket 130 to the first spring casing 122. In one particular form, the fastener 162 secures the horizontal position of the first spring casing 122 and the first spring bracket 130 relative to one another. The fastener 162 is shown as a horizontally extending pin, although other fasteners or different mechanical connections may be used.

[0042] In one particular form, the second spring casing 124 has a substantially open first end 166 through which the second spring 128 passes. The second spring 128 may be seated in a substantially closed second end 168 of the second spring casing 124. A lower portion of the second spring casing 124 has a curved configuration, although different shapes and dimensions may be used depending on the exterior or interior surface configuration of the housing 120.

[0043] The upper portion of the second spring casing 124 has one or more grooves 170 extending in the outer surface of the second spring casing 124 and along at least a portion of the second spring casing. These grooves may be provided on each side of the second spring casing. As best shown in FIG. 6, the grooves 170 receive second rails 172 formed on the housing 120. The slidable engagement of the rails 172 and the grooves 170 allows the second spring casing 124 to translate relative to the housing 120. This translation helps ensure smooth movement of the second arm 110 while minimizing or eliminating any bending or twisting forces caused by the second spring 128 during movement of the second arm 110 or components of the housing 120.

[0044] The upper portion of the second spring casing 124 further includes a rear wall 174. The rear wall 174 of the second spring casing 124 aligns with the front wall 160 of the first spring casing 122 when assembled. A rear projection 176 extends outwardly from the rear wall 174. The rear projection 176 engages the second spring bracket 132 when assembled. Openings may be formed in the second spring casing 124 to receive fasteners 178 to couple the second spring bracket 132 to the second spring casing 124. In one particular form, the fasteners 178 secure the horizontal positions of the second spring casing 124 and the second spring bracket 130 relative to one another. The fasteners 178 are shown as horizontally extending pins, although other fasteners or different mechanical connections may be used.

[0045] In one particular form, the second spring casing 124 has one or more flanges 180 that extend downward at an oblique angle and away from an end portion of the second spring casing 124. A pair of flanges 180 may be utilized that straddle each side of the direct link 140. The flanges 180 may extend outside the housing 120 and be visible by a user to verify the position of the second spring casing 124 set by the lockout mechanism 138. The angle of the flanges 180 may be set to provide clearance to allow movement of the second arm 110 relative to the first arm 106 and intermediate joint 108.

[0046] In one particular form, the first spring bracket 130 has a wall 182 and a pair of arms 184 extending from the wall 182. A rear end of the first spring bracket 130 can engage the wall 182. The wall 182 can have an opening to allow the adjustment mechanism 136 to pass through. The first and second arms 184 can be positioned to extend outside of the first spring casing 122. An opening is provided in each of the first and second arms 184 to receive a fastener 162 to couple the first spring bracket 130 to the first spring casing 122.

[0047] In one particular form, the second spring bracket 132 has a base 186 and a pair of arms 188 extending from the base 186. A slot may be formed between the base 186 and the arms 188 that receives the projection 176 of the second spring casing 124. An opening is provided in each of the first and second arms 188 for receiving a fastener 178 to couple the second spring bracket 132 to the second spring casing 124.

[0048] In one particular form, the lockout mechanism 138 includes a rotatable member 190 coupled to the fastener 178 of the second spring casing 124. The rotatable member 190 may be threadably coupled to the fastener 178 that couples the second spring bracket 132 to the second spring casing 124. The housing 120 may be configured to limit movement of the rotatable member 190 in at least one axial direction. In the illustrated embodiment, the rotatable member 190 has a head that is captured by one or more protrusions formed on the housing 120 to limit rearward movement of the rotatable member 190 as best shown in FIG. 3. The lockout mechanism 138 associated with the second spring casing 124 may be movable in a forward direction during movement of the second arm 110 from the raised position to the lowered position.

[0049] The rotatable member 190 may have a user interface (e.g., thumbwheel, hex socket, etc.) that allows for engagement and rotation by a user. A user may rotate the rotatable member 190, which causes translation of the fastener 178 in the axial direction of the rotatable member 190. Movement of the fastener 178 correspondingly moves the second spring bracket 132 and the second spring casing 124 toward or away from the first spring bracket 130 and the first spring casing 122. One or more slots or grooves 194 may be provided in the housing 120 to provide limited movement of the second spring bracket 132 and the second spring casing 124 relative to the housing 120.

[0050] 7, in one particular embodiment, when the lockout mechanism 138 is disengaged, the second spring bracket 132 engages the first spring bracket 130 and the second spring casing 124 engages the first spring casing 122, although only one side of the engagement can be used. In this configuration, the force of the first spring 126 and the second spring 128 is exerted on the spring link 134 to counterbalance the load of the display.

[0051] In some applications, the weight of the display may not require the force of both springs 126, 128. In such cases, the user may engage the lockout mechanism 138, thereby driving the fastener 178 forward, which causes the second spring bracket 132 and second spring casing 124 to move forward and disengage from the first spring bracket 130 and first spring casing 122 over at least a portion of the second arm's movement as shown in FIG.

[0052] In one particular form, when the arm is in its lowest position, the first spring casing 122 can be driven forward by the spring link 134 such that the first spring bracket 130 and first spring casing 122 engage the second spring bracket 132 and second spring casing 124 even when the lockout mechanism 138 is fully engaged. In one particular form, the lockout mechanism 138 can be used to position the second spring casing 124 such that the second spring 128 engages at a particular point of travel (e.g., an intermediate position) for the second arm 110 as the second arm 110 rotates relative to the first arm 106.

[0053] While the exemplary embodiment described above moves the second spring casing 124 to disengage from the second spring 128, other contemplated embodiments may utilize different mechanisms to disengage the second spring 128. For example, a separate plate or other member may be positioned to disengage the spring, such as by moving the rear end of the spring into the housing. Such a plate may be positioned within the casing or may be utilized in a housing separate from the casing.

[0054] The above detailed description of certain exemplary embodiments is provided for the purpose of illustrating general principles and practical applications, so that those skilled in the art can understand various modifications of the disclosure of the various embodiments and the specific uses envisioned. This specification is not necessarily intended to be exhaustive or to limit the disclosure to the exemplary embodiments disclosed. Any of the embodiments and / or elements disclosed herein can be combined with each other to form various additional embodiments not specifically disclosed. Thus, additional embodiments are possible and are within the scope of the invention as described herein and in the claims. This specification describes specific examples to achieve more general objectives that may be achieved in other ways.

[0055] The terms "front", "rear", "upper", "lower", "upper", "lower" and other directional terms used herein are intended to facilitate the description of the exemplary embodiments of the present invention and are not intended to limit the structure of the exemplary embodiments of the present invention to any particular position or orientation. Terms of degree, such as "substantially" or "about", are understood by those skilled in the art to mean a reasonable range off a given value, such as typical tolerances associated with the manufacture, assembly, and use of the described embodiments. Unless otherwise specified or limited, the terms "attached", "coupled", "supported", and "coupled" and variations of these terms are used broadly and include both direct attachment, direct coupling, direct support, and direct coupling, and indirect attachment, indirect coupling, indirect support, and indirect coupling.

Claims

1. 1. A support system for a display device, comprising: a first arm configured to extend from a support surface; a second arm rotatably coupled to the first arm, the second arm having a range of motion relative to the first arm; a tilt head rotatably coupled to the second arm and configured to couple to a display; a first biasing member positioned within the second arm and configured to provide a first counterbalancing force to the second arm to counteract a load of the display; a second biasing member positioned within the second arm and configured to provide a second counterbalancing force to the second arm to counteract the load of the display; a lockout mechanism configured to disengage the second biasing member and eliminate the second counterbalancing force over at least a portion of the range of motion.

2. The support system of claim 1 , wherein the lockout mechanism moves a portion of a second biasing member relative to the first biasing member to prevent the second counterbalancing force from acting with the first counterbalancing force.

3. 2. The support system of claim 1, wherein the first biasing member is coupled to a first bracket and the second biasing member is coupled to a second bracket, and the lockout mechanism is configured to move the second bracket relative to the first bracket to disengage from the second biasing member.

4. 4. The support system of claim 3, wherein the second arm is rotatably connected to the first arm about a first axis, and a link has a first end positioned on the first bracket and a second end positioned below the second axis.

5. 2. The support system of claim 1, wherein the first biasing member is positioned within the first casing and the second biasing member is positioned within the second casing, and the lockout mechanism is configured to move the second casing relative to the first casing to disengage from the second biasing member.

6. The support system of claim 5 , wherein the second casing is slidably coupled to the second arm.

7. The support system of claim 1 , wherein the lockout mechanism includes a rotatable member.

8. The support system of claim 1 , wherein an adjustment mechanism is configured to vary a magnitude of the first counterbalancing force provided by the first biasing member.

9. 1. A support system for a display device, comprising: a first arm configured to extend from a support surface; a second arm rotatably coupled to the first arm, the second arm having a range of motion relative to the first arm; a tilt head rotatably coupled to the second arm and configured to couple to a display; a first spring casing positioned within the second arm; a first spring positioned within the first spring casing; a second spring casing positioned within the second arm; a second spring positioned within the second spring casing; The second spring casing is movable from a first position in engagement with the first spring casing to a second position in disengagement with the first spring casing.

10. The support system of claim 9 , wherein a lockout mechanism is coupled to the second spring casing to move the second spring casing between the first position and the second position.

11. The support system of claim 10 , wherein the lockout mechanism includes a rotatable member accessible to a user to adjust a position of the second spring casing.

12. 10. The support system of claim 9, wherein the first spring casing is coupled to a first bracket and the second spring casing is coupled to a second bracket, the second bracket being engaged with the first bracket in the first position and the second bracket being disengaged from the second bracket in the second position.

13. The support system of claim 9 , wherein the first spring casing has a first groove and the second arm has a first rail that mates with the first groove.

14. The support system of claim 9 , wherein the first spring casing has a protrusion with a front wall and the second spring casing has a rear wall that mates with the front wall.

15. The support system of claim 9 , wherein an adjustment mechanism is configured to vary a magnitude of the first counterbalancing force provided by the first biasing member.

16. 1. A support system for a display device, comprising: a first arm configured to extend from a support surface; a second arm rotatably coupled to the first arm, the second arm having a range of motion relative to the first arm; a tilt head rotatably coupled to the second arm and configured to couple to a display; the first casing positioned within the second arm; a first bracket coupled to the first casing; a first biasing member positioned within the first casing and configured to provide a first counterbalancing force to the second arm to counterbalance a load of the display; a second casing positioned within the second arm; a second bracket coupled to the second casing; a second biasing member positioned within the second casing and configured to provide a second counterbalancing force to the second arm to counterbalance the load of the display; a lockout mechanism configured to disengage the second biasing member to eliminate the second counterbalancing force over at least a portion of the range of motion.

17. The support system of claim 16 , wherein the lockout mechanism is configured to move the second casing and the second bracket within the second arm relative to the first casing and the first bracket.

18. The support system of claim 16 , wherein the lockout mechanism includes a rotatable member accessible to a user through an opening in the second arm.

19. The support system of claim 16 , wherein a fastener passes through said second casing and said second bracket, and said lockout mechanism is threadably coupled to said fastener.

20. 17. The support system of claim 16, wherein the second arm is rotatably connected to the first arm about a first axis, and a link has a first end positioned on the first bracket and a second end positioned below the second axis.

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